Researchers have found that REM（rapid ey

考试题库2022-08-02 64

问题 Researchers have found that REM（rapid eye movement）sleep is important to human beings. This type of sleep generally occurs four or five times during one night of sleep lasting five minutes to forty minutes for each occurrence. The deeper a person's sleep becomes, the longer the periods of rapid eye movement.　　There are physical charges in the body to show that a person has changed from NREM（non-rapid eye movement）to REM sleep. Breathing becomes faster, the heart rate increases, and, as the name implies, the eyes begin to move quickly.　　Accompanying these physical changes in the body is a very important characteristic of REM sleep. It is during REM sleep that a person dreams.According to the passage, how often does REM sleep occur in one night?（　　）A. once B. twice C. four of five times D. forty times

选项 A. once
B. twice
C. four of five times
D. forty times

答案 C

解析由文章第一段第二句“…sleep generally occurs four or five times…”可知C项正确。

转载请注明原文地址:http://tihaiku.com/xueli/2664676.html

本试题收录于：高起本和高起专英语题库高起本高起专成考分类

高起本和高起专英语

高起本高起专成考

相关试题推荐

随机试题

最新回复(0)

Researchers have found that REM（rapid ey

高起本和高起专英语

高起本高起专成考

Researchersaretryingto________what'